:root {
  --deep: #061a33; --ink: #0b2340; --primary: #0b3768; --primary-dark: #082a50;
  --accent: #1279a3; --accent-light: #3fb4dc; --sun: #e0a020;
  --text: #1f2a36; --muted: #56636f; --line: #dbe0e6; --alt: #f6f4ee; --bg: #ffffff;
  --on-dark: #c3d2e2; --on-dark-muted: #94abc3; --ok: #0a7a4b; --err: #b3261e; --warn-bg: #fff6e0;
  --r: 2px; --wrap: 1160px;
  --serif: 'Source Serif 4', Georgia, serif; --sans: 'Be Vietnam Pro', system-ui, sans-serif;
}
.lang-ja { --serif: 'Noto Sans JP', 'Be Vietnam Pro', sans-serif; --sans: 'Noto Sans JP', 'Be Vietnam Pro', sans-serif; }
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 16.5px/1.7 var(--sans); padding-bottom: 64px; }
img { max-width: 100%; display: block; }
a { color: var(--primary); }
h1, h2, h3 { font-family: var(--serif); color: var(--ink); line-height: 1.2; text-wrap: balance; margin: 0 0 .6em; }
.lang-ja h1, .lang-ja h2, .lang-ja h3 { font-weight: 700; letter-spacing: 0; }
h1 { font-size: clamp(1.9rem, 4.6vw, 2.8rem); font-weight: 600; letter-spacing: -.012em; }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; }
p, li { text-wrap: pretty; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--bg); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--accent-light); outline-offset: 2px; }
.muted { color: var(--muted); }
.note { color: var(--muted); font-size: .94rem; border-left: 2px solid var(--line); padding-left: 12px; }

.topbar { background: var(--deep); font-size: 14px; }
.topbar .wrap { display: flex; gap: 20px; justify-content: flex-end; padding-block: 6px; }
.topbar a { color: var(--on-dark); text-decoration: none; }
.hd { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid var(--line); }
.hd-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 17px; white-space: nowrap; }
.brand img { width: 40px; height: auto; }
.menu-btn { display: none; font: 600 15px var(--sans); background: none; border: 1px solid var(--line); border-radius: var(--r); padding: 8px 14px; color: var(--ink); cursor: pointer; }
.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav > a:not(.btn) { color: var(--text); text-decoration: none; padding: 8px 10px; font-size: 15px; font-weight: 500; border-bottom: 2px solid transparent; }
.nav > a[aria-current] { border-bottom-color: var(--accent); color: var(--ink); }
.nav > a:not(.btn):hover { color: var(--primary); }
.langs { display: flex; gap: 2px; margin: 0 8px; font-size: 13px; font-weight: 600; }
.langs a, .langs span { padding: 4px 6px; text-decoration: none; color: var(--muted); }
.langs span { color: var(--ink); border-bottom: 2px solid var(--ink); }

.btn { display: inline-block; background: var(--primary); color: #fff; border: 0; border-radius: var(--r); padding: 13px 26px; font: 600 15px var(--sans); text-decoration: none; cursor: pointer; transition: background .15s; }
.btn:hover { background: var(--primary-dark); }
.btn:disabled { opacity: .6; cursor: wait; }
.btn-sm { padding: 9px 16px; }
.btn-ghost { background: transparent; color: #fff; box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.8); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-ghost-d { background: transparent; color: var(--primary); box-shadow: inset 0 0 0 1.5px var(--primary); }
.btn-ghost-d:hover { background: var(--alt); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.link { font-weight: 600; }

.hero { position: relative; background: var(--deep); color: #fff; overflow: hidden; }
.hero-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .38; }
.hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,26,51,.92) 0%, rgba(6,26,51,.55) 70%, rgba(6,26,51,.3) 100%); }
.hero-in { position: relative; z-index: 1; padding-block: clamp(56px, 10vw, 120px); max-width: var(--wrap); }
.hero h1 { color: #fff; max-width: 20ch; }
.lang-ja .hero h1 { max-width: 24em; }
.hero .lead { color: var(--on-dark); max-width: 60ch; font-size: 1.08rem; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; font-weight: 600; color: var(--accent); margin: 0 0 12px; }
.hero .eyebrow { color: var(--accent-light); }
.lang-ja .eyebrow { text-transform: none; letter-spacing: .02em; }

.facts { background: var(--ink); color: var(--on-dark); }
.facts-in { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding-block: 28px; }
.facts-in.f4 { grid-template-columns: repeat(4, 1fr); }
.facts p { margin: 0; font-size: 14.5px; }
.fact-n { font-family: var(--serif); font-size: 1.7rem !important; color: #fff; font-weight: 600; }

.sec { padding-block: clamp(48px, 7vw, 84px); }
.sec.alt { background: var(--alt); }
.ph { background: var(--alt); border-bottom: 1px solid var(--line); padding-block: clamp(40px, 6vw, 72px); }
.ph .lead, .lead-s { color: var(--muted); max-width: 68ch; font-size: 1.05rem; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: start; }

.cards { display: grid; gap: 20px; }
.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { display: block; background: var(--bg); border-top: 2px solid var(--ink); padding: 22px 22px 24px; border-radius: var(--r); color: inherit; text-decoration: none; box-shadow: 0 0 0 1px var(--line); }
.sec.alt .card { box-shadow: none; }
a.card { transition: box-shadow .15s, transform .15s; }
a.card:hover { box-shadow: 0 0 0 1px var(--primary), 0 6px 18px rgba(11,35,64,.08); }
.card p { margin: 0 0 .6em; }
.more { font-weight: 600; color: var(--primary); font-size: 15px; }
.pkg-k { font-family: var(--serif); font-size: 2.2rem; color: var(--accent); margin: 0 !important; line-height: 1; }
.pkg ul { padding-left: 18px; margin: 8px 0 0; }
.tag { font-size: 13px; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: .05em; }
.lang-ja .tag { text-transform: none; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 14px; color: var(--muted); }
.mini { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 16px 0; }
.mini dt { font-size: 13px; color: var(--muted); }
.mini dd { margin: 0; font-weight: 600; }

.how svg { width: 100%; height: auto; }
.how .node rect { fill: var(--bg); stroke: var(--ink); stroke-width: 1.5; rx: 2; }
.how .node.main rect { fill: var(--primary); stroke: var(--primary); }
.how .node.main text { fill: #fff; }
.how .node.ems rect { fill: var(--alt); stroke-dasharray: 4 3; }
.how text { font: 600 15px var(--sans); fill: var(--ink); }
.how .sun { fill: var(--sun); }
.how .flow { stroke: var(--accent); stroke-width: 2; fill: none; }
.how .data { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 4 4; fill: none; }
.how .arh { fill: var(--accent); }
.how-list { padding-left: 20px; margin: 16px 0 0; font-size: 15px; }

.chart { margin: 0; }
.chart svg { width: 100%; height: auto; background: var(--bg); }
.chart .ax { stroke: var(--line); }
.chart text { font: 12px var(--sans); fill: var(--muted); }
.chart .pv { fill: var(--sun); opacity: .28; }
.chart .ld { stroke: var(--primary); stroke-width: 2.5; fill: none; }
.chart .ld-k { fill: var(--primary); }
.chart .pv-k { fill: var(--sun); opacity: .5; }
.chart figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; }
.caution { background: var(--warn-bg); padding: 12px 16px; border-left: 3px solid var(--sun); }
.cta-box { background: var(--alt); padding: 28px; border-top: 2px solid var(--ink); }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 20px; counter-reset: s; }
.steps li { display: flex; flex-direction: column; gap: 10px; border-top: 2px solid var(--ink); padding-top: 14px; }
.steps .n { font-family: var(--serif); font-size: 1.6rem; color: var(--accent); line-height: 1; }
.steps h3 { margin-bottom: .3em; }
.steps p { margin: 0 0 .4em; font-size: 15px; }
.deliver { color: var(--muted); }

.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 14px 28px 14px 0; font-weight: 600; color: var(--ink); list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 4px; top: 12px; font-size: 1.3rem; color: var(--accent); }
.faq details[open] summary::after { content: '–'; }
.faq p { margin: 0 0 16px; color: var(--text); }
.ticks { padding-left: 20px; }
.ticks li { margin-bottom: 6px; }

.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.tbl { width: 100%; border-collapse: collapse; font-size: 15px; background: var(--bg); }
.tbl th, .tbl td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl thead th { background: var(--ink); color: #fff; font-weight: 600; }
.tbl tbody th { font-weight: 500; color: var(--muted); width: 40%; }

form label { display: block; font-weight: 600; font-size: 15px; color: var(--ink); margin-bottom: 16px; }
form small { display: block; font-weight: 400; color: var(--muted); font-size: 13.5px; margin-top: 4px; }
input:not([type=checkbox]):not([type=radio]):not([type=range]), select { display: block; width: 100%; margin-top: 6px; font: 400 16px var(--sans); padding: 11px 12px; border: 1px solid #b9c2cc; border-radius: var(--r); background: #fff; color: var(--text); }
input[type=range] { width: 100%; margin-top: 8px; accent-color: var(--primary); }
fieldset { border: 0; padding: 0; margin: 0 0 16px; min-width: 0; }
legend { font-weight: 600; font-size: 15px; color: var(--ink); margin-bottom: 6px; padding: 0; }
.seg-ctl { display: flex; flex-wrap: wrap; gap: 6px; }
.seg-ctl label { margin: 0; font-weight: 500; }
.seg-ctl input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.seg-ctl span { display: inline-block; padding: 9px 14px; border: 1px solid #b9c2cc; border-radius: var(--r); cursor: pointer; background: #fff; }
.seg-ctl input:checked + span { background: var(--primary); border-color: var(--primary); color: #fff; }
.seg-ctl input:focus-visible + span { outline: 3px solid var(--accent-light); outline-offset: 2px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.chk { display: flex !important; gap: 10px; align-items: flex-start; font-weight: 400 !important; }
.chk input { margin-top: 5px; width: 18px; height: 18px; accent-color: var(--primary); flex: none; }
.chk[hidden] { display: none !important; }
.hp { position: absolute; left: -9999px; }
.lead-form { background: var(--bg); padding: clamp(20px, 4vw, 36px); border-top: 2px solid var(--ink); max-width: 760px; }
.split .lead-form { margin: 0; }
.form-msg { margin: 12px 0 0; min-height: 1.5em; font-weight: 500; }
.form-msg.ok { color: var(--ok); }
.form-msg.err, .calc-err { color: var(--err); }

.calc { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.result { background: var(--alt); border-top: 2px solid var(--ink); padding: 24px; position: sticky; top: 84px; }
.res { margin: 0 0 16px; }
.res div { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.res dt { color: var(--muted); font-size: 15px; }
.res dd { margin: 0; text-align: right; }
.res b { color: var(--ink); font-size: 1.08rem; }
.pkg-res { display: flex; gap: 16px; align-items: flex-start; margin: 16px 0; }
.pkg-res p { margin: 0 0 4px; }
.warn { background: var(--warn-bg); border-left: 3px solid var(--sun); padding: 10px 14px; margin: 8px 0; font-size: 15px; }
.assume li { margin-bottom: 6px; }

.prose { max-width: 72ch; }
.prose h2 { margin-top: 1.6em; font-size: 1.35rem; }
.contact-card .big { font-size: 1.6rem; font-weight: 700; text-decoration: none; }

.ft { background: var(--deep); color: var(--on-dark); font-size: 14.5px; padding-top: 48px; }
.ft-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 28px; }
.ft p { margin: 0 0 6px; }
.ft a { color: var(--on-dark); }
.ft ul { list-style: none; padding: 0; margin: 0; }
.ft li { margin-bottom: 6px; }
.ft-name, .ft-h { color: #fff; font-weight: 600; }
.ft-note { border-top: 1px solid rgba(255,255,255,.12); margin-top: 32px; padding-block: 20px; color: var(--on-dark-muted); font-size: 13.5px; }

.dock { position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; display: grid; grid-template-columns: 1fr 1fr 1.6fr; background: var(--bg); border-top: 1px solid var(--line); }
.dock a { text-align: center; padding: 14px 8px; font-weight: 600; text-decoration: none; color: var(--primary); font-size: 15px; }
.dock a + a { border-left: 1px solid var(--line); }
.dock .dock-main { background: var(--primary); color: #fff; }

.ph-img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--r); background: var(--line); margin: 16px 0; }
.ph-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: center; }
.ph-grid .ph-img { margin: 0; }
.card-img { padding-top: 0; overflow: hidden; }
.card-pic { display: block; width: calc(100% + 44px); max-width: none; margin: 0 -22px 18px; height: auto; aspect-ratio: 3 / 2; object-fit: cover; background: var(--line); }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 32px; }
.duo .ph-img { margin: 0; }
.prose > .ph-img { margin: 0 0 24px; }
@media (max-width: 760px) { .ph-grid, .duo { grid-template-columns: 1fr; } }

@media (min-width: 1061px) {
  body { padding-bottom: 0; }
  .dock { left: auto; right: 20px; bottom: 20px; grid-template-columns: auto auto; box-shadow: 0 6px 24px rgba(6,26,51,.18); border: 0; border-radius: var(--r); }
  .dock .dock-main { display: none; }
}
@media (max-width: 1060px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--bg); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .nav > a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .langs { margin: 12px 0; }
  .hd-in { position: relative; }
  .c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: 1fr; }
  .steps li { flex-direction: row; }
  .ft-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .split, .calc, .c2, .c3, .c4, .grid2 { grid-template-columns: 1fr; }
  .facts-in, .facts-in.f4 { grid-template-columns: 1fr; gap: 14px; }
  .result { position: static; }
  .ft-grid { grid-template-columns: 1fr; }
  .topbar .wrap { justify-content: center; font-size: 13px; gap: 14px; }
  .mini { grid-template-columns: 1fr 1fr; }
  .tbl { font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }